PeakTech 2020 GN User manual

Safety precautions
To ensure safe operation of the equipment and eliminate the danger of serious injury due to short-circuits
(arcing), the following safety precautions must be observed.
Damages resulting from failure to observe these safety precautions are exempt from any legal claims
whatever.
• prior to connection of the equipment to the mains outlet, check that the available mains voltage
corresponds to the voltage setting of the equipment.
• connect the mains plug of the equipment only to a mains outlet with earth connection.
• do not place the equipment on damp or wet surfaces.
• do not subject the equipment to direct sunlight or extreme temperatures.
• do not subject the equipment to extreme humidity or dampness.
• replace a defective fuse only with a fuse of the original rating. Never short-circuit fuse or fuse housing.
• do not exceed the maximum permissible input ratings.
• conduct measuring works only in dry clothing and in rubber shoes i.e. on isolating mats.
• comply with the warning labels and other info on the equipment.
• check test leads and probes for faulty insulation or bare wires before connection to the equipment.
• disconnect test leads or probe from the measuring circuit before switching modes or functions.
• do not cover the ventilation slots of the cabinet to ensure that the air is able to circulate freely inside.
• do not insert metal objects into the equipment by way of the ventilation slots.
• do not place water-filled containers on the equipment (danger of short-circuit in case of knockover of the
container).
• do not operate the equipment near strong magnetic fields (motors, transformers etc.)
• do not subject the equipment to shocks or strong vibrations.
• keep hot soldering irons or guns away from the equipment.
• allow the equipment to stabilize at room temperature before taking up measurement (important for exact
measurements)
• do not modify the equipment in any way.
• do not place the equipment face-down on any table or work bench to prevent damaging the controls at
the front.
• opening the equipment and service- and repair work must only be performed by qualified service
personnel. Repair work should only be performed in the presence of a second person trained to
administer first aid, if needed.
Cleaning the cabinet
Prior to cleaning the cabinet, withdraw the mains plug from the power outlet. Clean only with a damp, soft
cloth and a commercially available mild household cleanser. Ensure that no water gets inside the equipment
to prevent possible shorts and damage to the equipment.
Measuring instruments don't belong to children's hands
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Caution and warning statements
CAUTION Is used to indicate correct operating or maintenance procedures in order
to prevent damage or destruction of the equipment or other property
WARNING Calls attention to a potential danger that requires correct procedures or
practices in order to prevent personal injury.
Symbols
Caution (refer to accompanying documents) and Warning
protective ground (earth) symbol
1. Introduction
Thank you for purchasing this product. This oscilloscope is a high technical product made under strict quality
control. We guarante their exceptional precision and utmost reliability. For proper use of the proudct please
read this user manual carefully.
1.1 Instructions
1. To maintain the precision and reliability of the product use it in the standard setting (temperature 10°
to 35° centigrade, humidity 45 - 85 %).
2. After turning on power, please allow a 20-minute pre-heating period before use.
3. Triple-line power cord is to be used for the product. But when you are using the doubleline cord,
make sure for safety.
4. For quality improvement the exterior design and specifications of the product can be changed
without prior notice.
5. If you have further questions concerning use, please contact your dealer.
1.2 Specifications
CRT
Configuration 6-inch rectangular tube with internal gratitude;
Effective Surface 8 x 10 division (1 div. = 1 cm), marking for measuring rise and fall time.
control axis is graduated in 2 mm subdivisions.
Accelerating Potential approx. +1.9 kV DC (Cathode basis)
Phosphor P31 (Standard)
Focussing possible
Trace rotation provided
Intensity Control provided
Z-Axis input (Intensity Modulation)
Input signal Positive going signal decreases intensity +5 Vpp or more signal cases
noticeable modulation at normal intensity settings.
Band width DC-2 MHz (-3 dB)
Coupling DC
Input impedance 20 k - 30 kΩ
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Maximum input voltage 30 V (DC + peak AC)
Vertical Deflection
Band width (-3 dB)
DC coupled DC to 20 MHz normal (x 1)
DC to 10 MHz magnified (x 5) - only CH 1
AC coupled 10 Hz to 20 MHz normal (x 1)
10 Hz to 10 MHz magnified (x 5) - only CH 1
Modes CH1, CH2, ADD, DUAL (CHOP: Time/div switch):
0,2 s-1 ms, ALT: Time/div. switch: 0,5 ms-0.2 µs
Deflection Factor 5 mV/div to 20 V/div in 10 calibrated steps of a 1-2-5 sequence.
Continuously variable between steps at least 1:2.5
X5 MAG: 1 mV/div. to 1 V div. in 10 calibrated steps (CH 1 only)
Accuracy Normal: ± 3 %, Magnified: ± 5 % (only CH 1)
Input impedance approx. 1 MΩin parallel with 30 pF
Maximum input voltage Direct: 400 V (DC + peak value AC)
Probe: refer to probe specification
Input Coupling DC-GND-AC
Rise Time 17.5 ns of less (35 ns or less: x 5 MAG)
CH 1 Output Termination connection 25 mV/div to 50 Ω: 20 Hz to 10 MHz (-3 dB)
Polarity Inversion CH 2 only
Horizontal Deflection
Display modes x 1, x10, VARIABLE, X .Y,
Time base 0,2 µs, div to 0.2 s/div in 19 calibrated steps with 1-2-5 sequence
uncalibrated continuous control of over 2.5 times is possible
Sweep Magnifications 10 times (maximum sweep rate: 20 ns/div.
Note: 50 ns/div of A Time bases are ± 10 %
Accuracy ± 3 %, ± 5 % (0° C to 40° C), ± 2% increase when magnified
Trigger System
Modes AUTO, NORM, TV-V, TV-H
Source VERT (DUAL, ALT), CH1, LINE, EXT
Coupling AC
Slope + or -
Senstivity & Frequency Range
AUTO, NORM 20 Hz - 2 MHz 20 Hz - 20 MHz
INT (VERT) 0.5 div (2.0 div) 1.5 div (3.0 div)
EXT 0.2V
p-p 0.8 Vp-p
TV-V, TV-H at least 1 div. or 1.0 Vpp
External trigger input impdance Capactive of some 30 pF with approx. 1 MΩin parallel
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Max. Input voltage 400 V DC + peak value AC
X-Y Operation
X-axis (Same as CH 1 except for the following)
Deflection Factor: Same as of CH 1
Accuracy: ± 5 %
Frequency Response: DC to 500 kHZ (-3 dB)
Y-axis Same as CH 2
X-Y Phase Difference 3° or less (up to 50 kHz in DC)
Component Test (PeakTech 2030 KT only)
*one test lead is grounded (safety earth
Test voltage approx. 4,5 Vrms (open circuit)
Test current max. 6,6 mArms (short circuit)
Test frequency approx. 60 Hz
Calibrator (Probe Adjustor) approx. 1 kHz ± 20 %, 0.5 V (± 10 %) square wave duty ratio:
40 ~60%
Voltage range Fuse (250 V)
UL 198 G IEC 127
115 (98 – 125 V) AC 1.25 A 1.25 A
230 (198-250 V) AC 0,63 A 0,63 A
Frequency 50/60 Hz
Power Consumption approx. 45 W
Weight/Dimension
Weight 7,8 kg
Dimension 316 mm (W) x 132 mm (H) x 410 mm (L)
Environmental Charac.
Temperature range +10° C to + 35° C (+50° F to +95° F)
for rated operation
Max. ambient operating
temperature 0° C to +40° C (+32° F to 104° F)
Max. storage temperature -20° C to +70° C (-4° F to 158° F)
Humidity range for rated
operation 45 % to 85 % RH
Max. ambient operating
humidity 35 % to 85 % RH
Safety EN 61010-1 overvoltage CAT II, degree of polution 2
Approval: TÜV/GS
EMC Interference: EN 50081-1
Susceptability: EN 50082-1, IEC801-2, 3, 4
Caution: Sources like small hand-held radio transceivers, fixed station radio and television transmitters,
vehicle radio transmitters and cellular phones generate electromagnetic radiation that may induce voltages in
the leads of a test probe in such cases the accuracy of the oscilloscope cannot be guaranteed due to
physical reasons. Using the 8 div scale, the oscilloscope radiation can be exceeded the limit.
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Power Supply

1.3 Precautions
1.3.1 Line voltage selection
This instrument must be operated with the correct Line Voltage Selector Switch setting and the correct line
fuse for the voltage selected to prevent damage. The instrument operates from either a 98 to 125 volts or a
198 to 250 volt line voltage source. Before line voltage is applied to the instrument, make sure the Line
Voltage Selector is set correctly.
To change the line voltage selection:
1. Make sure the instrument is disconnected from the power source.
2. Switch the line voltage selector to the desired position.
3. Pull out the Line Fuse Holder containing the fuse for overload protection. Replace the fuse in the
holder with the correct fuse from table 1-1 and plug it in.
Table 1-1: Line voltage Selection and Fuse ratings
Fuse Ratings (250 V)
Line voltage Arrow Mark Position UL198 G IEC127
98 to 125 volts 115 F 1,25 A F1.25 A
198 to 250 volts 230 F0.63 A F0.63 A
1.3.2 Installation and handling precautions
When placing the PeakTech 2020 GN or PeakTech 2030 KT in Service at your workplace, observe the
following precautions for best instrument performance and longest service life.
• Avoid placing this instrument in an extremely hot or cold place. Specifically, don't leave this instrument in
a close car, exposed to sunlight in midsummer, or next to a space heater.
• Don't use this instrument immediately after bringing it in from the cold. Allow time for it to warm to room
temperature. Similiary don't move it from a warm place to a very cold place, as condensation might
impair its operation.
• Do not expose the instrument to wet or dusty environments.
• Do not place liquid-filled containers (such as coffee cups) on top of this instrument. A spill could seriously
damage the instrument.
• Do not use this instrument where it is subject to severe vibration, or strong blows.
• Do not place heavy objects on the case, or otherwise block the ventilation holes.
• Do not use this oscilloscope in strong magnetic fields, such as near motors.
• Do not insert wires, tools, etc. through the ventilation holes.
• Do not leave a hot soldering iron near the instrument.
• Do not place this scope face down on the ground, or damage to the knobs may result.
• Do not use this instrument upright while BNC cables are attached to the rear-panel connectors. This will
damage the cable.
• Do not apply voltages in excess of the maximum ratings to the input connectors or probes.
2. Operating instructions
This section contains the information needed to operate the PeakTech 2020 GN or PeakTech 2030 KT and
utilize it in a variety of basic and advanced measurement procedures. Included are the identification and
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function of controls, connectors, and indicators, startup procedures, basic operation routines, and selected
measurement procedures.
Fig. 2-1 Front Panel Items
Fig. 2-2 Rear Panel Items
2.1 Function of controls, connectors and indicators
Before turning this instrument on, familiarize yourself with the controls, connectors, indicators, and other
features described in this section. The following descriptions are keyed to the items called out in Figures 2-1
and 2-2.
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2.1.1 Display and Power Blocks
(16) POWER switch
Push into turn instrument power on and off.
(16-1) POWER lamp
Sights when power is on
(2) INTEN control
Adjusts the brightness of the CRT display. Clockwise rotation increases brightness.
(1) FOCUS control
To obtain maximum trace sharpness.
(29) Rotation control
Allows screwdriver adjustment of trace alignment with regard to the horizontal gratitude lines of CRT.
(32) Fuse holder
(33) Voltage Selector
Permits changing the operating voltage range
(34) Power Connector
Permits removal or replacement of the AC power cord.
2.1.2 Vertical Amplifier Block
(24) CH1 or X IN connector
For applying an input signal to vertical amplifier channel 1, or to the X-axis (horizontal) amplifier
during X-Y operation.
Caution:
To avoid damage to the oscilloscope, do not apply more than 400 V (DC + Peak AC) between
"CH1" terminal and ground.
(22) CH2 or Y IN connector
For applying an input signal to vertical amplifier channel 2, or to the Y-axis (vertical) amplifier during
X-Y operation.
Caution:
To avoid damage to the oscilloscope, do not apply more than 400 V (DC + Peak AC) between "CH"
terminal and ground.
(25) CH1 AC/GND/DC switch
To select the method of coupling the input signal to the CH 1 vertical amplifier. AC position inserts a
capacitor between the input connector and amplifier to block any DC component in the input signal.
GND position connects the amplifier to ground instead of the input connector, so a ground reference
can be established.
DC position connects the amplifier directly to its input connector, thus passing all signal components
onto the amplifier
(21) CH 2 AC/GND/DC switch
To select the method of coupling the input signal to the CH 2 vertical amplifier.
(26) CH 1 VOLTS/DIV switch
To select the calibrated deflection factor of the input signal fed to the CH 1 vertical amplifier.
(23) CH 2 VOLTS/DIV switch
To select the calibrated deflection factor of the input signal fed to the CH 2 vertical amplifier.
(27)+ VARIABLE controls
(20) Provide continuously variable adjustment of deflection factor between steps of the VOLTS/DIV
switches.
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VOLTS/DIV calibrations are accurate only when the VARIABLE controls are click-stopped in their
fully clockwise position.
(3) X5 MAG switch
The sensibility of vertical axis will become 5 times if the switch is selected at X5 MAG. That's to say,
the measuring voltage will be 1/5 of indicator value of volts/div. (in this instance the maximum
sensitivity will be 1 mV/div.)
(4) CH 1 POSITION control
For vertically positioning the CH 1 trace on the CRT screen. Clockwise rotation moves the trace
upward, counterclockwise rotation moves the trace down.
(7) CH 2 Position control
For vertically positioning the CH 2 trace on the CRT screen. Clockwise rotation moves the trace
upward, counterclockwise rotation moves the trace downward.
(6) CH 2 INV switch
Select switch at INV the signal added to CH 2 will be turned over.
(5) V MODE Switch
To select the vertical-amplifier display mode.
CH1 position displays only the channel 1 input signal on the CRT screen.
CH2 position displays only the channel 2 input signal on the CRT screen.
DUAL position displays the CH 1 and CH 2 input signal on the CRT screen simultaneously.
CHOP mode: TIME/DIV 0.2 s-5 ms
ALT mode: TIME/DIV 2 ms-0.2 µs
ADD position displays the algebraic sum of CH 1 & CH 2 signals.
(30) CH 1 OUTPUT connector
Connector provides amplified output of the channel 1 signal suitable for driving a frequency counter
or other instrument.
2.1.3 Sweep and Trigger Blocks
(15) TIME/DIV switch
To select either the calibrated sweep rate of the main timebase, the delay-time range for delayed-
sweep operation, or X-Y operation
(13) CAL/VAR switch
to change between CALibrated Time/Div steps and VARiable control
(12) VARIABLE control
Provides continuously variable adjustment of sweep rate between steps of the TIME/DIV switch.
TIME/DIV calibrations are accurate only when the VARIABLE control is click-stopped fully clockwise.
(11) X10 MAG switch
Placing the switch on X10 MAG sweep time will expanded to 10 times and in this instance sweep
time becomes 1/10 of TIME/DIV inicator value.
(10) Horizontal POSITION control
To adjust the horizontal position of the traces displayed on the CRT. Clockwise rotation moves the
traces to the right, counterclockwise rotation moves the traces to the left.
(14) Trigger MODE switch
To select the sweep triggering mode. AUTO position selects free-running sweep where a baseline is
displayed in the absence of a signal. This condition automatically reverts to triggered sweep when a
trigger signal of 25 Hz or higher is received and other trigger controls are properly set.
NORM position produces sweep only when a trigger signal is received and other controls are
properly set. No trace is visible if any trigger requirement is missing. This mode must be used when
the signal frequency is 25 Hz or lower.
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TV-V position is used for observing a composite video signal at the frame rate.
TV-H position is used for observing a composite video signal at the line rate.
(18) Trigger SOURCE switch
To conveniently select the trigger source.
VERT: In case of vertical mode switch is CH 1 which automatically becomes registry source.
In case of vertical mode switch is CH 2 which automatically becomes registry source.
Note:
Measurement of VERT condition will be possible only Time/Div. switch is on 0,5 ms/Div. to 0.2
µs/Div. when it is dual mode. When there is no sign on CH 1 & CH 2 place the vertical mode switch
to dual and set TRIGGER SOURCE switch at VERT sweep may flickers but please be careful as it is
not out of order.
CH 1: When there is sign on CH 1 you may select trigger source CH 1.
LINE position selects a trigger derived from the AC power line. This permits the scope to stabilize
display linearelated components of a signal even they are very small compared to other components
of the signal.
EXT position selects the signal applied to the EXT TRIG IN connector.
(9) Trigger LEVEL control
To select the trigger-signal amplitude at which triggering occurs. When rotated clockwise, the trigger
point moves toward the positive peak of the trigger signal. When its control is rotated counter-
clockwise, the trigger point moves toward the negative peak of the trigger signal.
(8) Trigger SLOPE switch
To select the positive or negative slope of the trigger signal for initiating sweep.
(19) EXT TRIG IN connector
For applying external trigger signal to the trigger circuits.
Caution:
To avoid damage to the oscilloscope, do not apply more than 250 V (DC + Peak AC) between "EXT
TRIG IN" terminal and ground.
2.1.4 Miscellaneous Features
(31) EXT BLANKING INPUT connector
For applying signal to intersity modulate the CRT. Trace brightness is reduced with a positive signal,
and increased with a negative signal.
(17) PROBE ADJUST
Provides a fast-rise square wave of precise amplitude for probe adjustment and vertical amplifier
calibration.
(28) Ground connector
Provides an attachment point for separate ground lead.
2.1.5 Component Test Block (only PeakTech 2030 KT)
(35) Component Test switch
Push to test the component. Then the horizontal bar graph of 8 div is displayed on the screen.
(36) Component Test Input (red)
Be used for connecting component to component test circuit with DMM probe (red).
(37) Component Test GND (black)
Be used for grounding component to component test circuit with DMM probe (black)
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2.2 Basic Operationg Procedures
The following paragraphs in this section describe how to operate the PeakTech 2020 GN and PeakTech
2030 KT, beginning with the most elementary operating modes, and progressing to the less frequently-
used/or complex modes.
2.2.1 Preliminary Control Settings and Adjustments
Before placing the instrument in use, set up and check the instrument as follows:
1. Set the following controls as indicated
POWER Switch (16) OFF (relaesed)
INTEN control (2) Fully CCW
FOCUS control (1) Mid rotation
AC/GND/DC switches (25) (21) AC
VOLTS/DIV switches (26) (23) 20 mV
X5 MAG switch (3) X1
Vertical POSITION controls (4) (7) Mid rotation
INV switch (6) Norm
VARIABLE controls (27) (20) Fully CW
V MODE switch (5) CH1
TIME/DIV switch (15) 5 µs
VARIABLE control (13) CAL
Horizontal POSITION conrol (10) Mid rotation
X10 MAG switch (11) X1
Trigger MODE switch (14) AUTO
Trigger SOURCE switch (18) INT, VERT
Trigger LEVEL control (9) Mid rotation
SLOPE switch (8) "+"
2. Connect the AC power cord to the power connector (34), then plug the cord into a convenient AC
outlet.
3. Press in the POWER switch (16). The POWER lamp (16-1) should light immediately. About 30
seconds later, rotate the INTEN control (2) clockwise until the trace appears on the CRT screen.
Adjust brightness to your liking.
Caution: A burn resistant material is used in the CRT. However if the CRT is left with an extremely bright dot
or trace for a very long time, the screen may be damaged. Therefore, if a measurement requires high bright-
ness, be certain to turn down the INTEN control immediately afterward. Also, get in the habit of turning the
brightness way down if the scope is left unattended for any period of time.
4. Turn the FOCUS control (1) for a sharp trace.
5. Turn the CH 1 Vertical POSITION control (4) to move the CH 1 trace to the center horizontal
gratitude line.
6. See if the trace is precisely parallel with the gratitude line. If it is not, adjust the Rotation control (29)
with a small screwdriver.
7. Turn the Horizontal POSITION control (10) to align the left edge of the trace with the leftmost
gratitude line.
8. Set one of the supplied probes for 10 X attuation. Then, connect its BNC end to the CH 1 or X IN
connector (24) and its tip the PROBE ADJUST connector (17). A square-wave display, two and a
half divisions in amplitude, should appear on the CRT screen.
9. If the tops and bottoms of the displayed square waves are tilted or peaked, the probe must be
compensated (matched to the scope input capacitance). Adjust the capacitance correction trimmer
of the probe with small screwdriver. See figure 2-2 (b).
10. Set the V MODE switch (5) to CH 2, and perform steps 8 and 9 with the other probe on channel 2.
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(a) Probe
(b) PROBE compensation by Correction Square-Wave
Abb. 2.2 Probe compensation
2.2.2 Signal Connections
There are three methods of connecting an oscilloscope to the signal you wish to observe. They are: a simple
wire lead, coaxial cable, and scope probes.
A simple lead wire may be sufficient when the signal level is high and the source impedance low (such as
TTL circuitry), but is not often used. Unshielded wire picks up hum and noise; this distorts the observed
signal when the signal level is low.
Also, there is the problem of making secure mechanical connection to the input connectors. A binding post to
BNC adapter is advisable in this case.
Coaxial cable is the most popular method of connecting an oscilloscope to signal sources and equipment
having output connectors. The outer conductor of the cable shields the central signal conductor from hum
and noise pickup. These cables are usually fitted with BNC connectors of each end, and specialized cable
and adaptors are readily available for mating with other kinds of connectors.
Scope probes are the most popular method of connecting the oscilloscope to circuitry. These probes are
available with 1 X attenuation (direct connection) and 10 X attenuation. The 10 X attenuator probes increase
the effective input impedance of the probe/scope combination to 10 MΩshunted by a few picofarads, the
reduction in input capacitance is the most important reason for using attenuator probes at high frequencies,
where capacitance is the major factor in loading down a circuit and distorting the signal. When 10 X
attenuator probes are used, the scale factor (VOLTS/DIV switch setting) must be multiplied by ten.
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Despite their high input impedance, scope probes do not pickup appreciable hum or noise. As was the case
with coaxial cable, the outer conductor of the probe cable shields the central signal conductor. Scope probes
are also quite convenient from a mechanical standpoint.
To determine if a direct connection with shielded cable is permissible, you must know the source impedance
of the circuit you are connecting to, the highest frequencies involved, and the capacitance of the cable. If any
of these factors are unknown, use a 10 X low-capacitance probe.
An alternative connection method at high frequencies is terminated coaxial cable. A feed-thru terminator
have an impedance equal to that of the signal-source impedance is terminated coaxial cable. A feed-thru
terminator having an impedance equal to that of the signal-source impedance is connected to the
oscilloscope input connector. A coaxial cable of matching impedance connects the signal source to the
terminator. This technique allows using cables of nearly and practical length without signal loss.
If a low-resistance ground connection between oscilloscope an circuit is not established, enormous amounts
of hum will appear in the displayed signal. Generally, the outer conductor of shielded cable provides the
ground connection. If you are using plain lead wire, be certain to first connect a ground wire between the
oscilloscope Ground connector (28) and the chassis or ground bus of the circuit under observation.
WARNING!
The oscsilloscope has an earth-grounded chassis (via the 3-prong power cord). Be certain the device
to which you connect the scope is transformer operated. Do not connect this oscilloscope or any
other test equipment to "AC/DC", "hot chassis", or "transformerless" devices.
Similary, do not connect this scope directly to the AC power line or any circuitry connected directly
to the power line. Damage to the instrument and severe injurt to the operator may result from failure
to heed this warning.
2.2.3 Single-trace Operation
Single-trace operation with single timebase and internal triggering is the most elementary operating mode of
the PeakTech 2020 GN or PeakTech 2030 KT. Use this mode when you wish to observe only a single signal,
and not be disturbed by other traces on the CRT. Since this is fundamentally a two-channel instrument, you
have a choice from your single channel. Channel 1 has an output terminal; use channel 1 if you also want to
measure frequency with a counter while observing the waveform. Channel 2 has a polarity inverting switch.
While this adds flexibility, it is not too useful in ordinary single-trace operation.
The PeakTech 2020 GN/PeakTech 2030 KT is set up for single-trace operation as follows:
1. Set the following controls as indicated below. Note that the trigger source selected (CH 1 or CH 2
Source) must match the single channel selected (CH 1 or CH 2 V MODE)
POWER switch (16) ON (pushed in)
AC/GND/DC switches (25) (21) AC
Vertical POSITION controls (4) (17) Mid rotation
VARIABLE controls (27) (20) Fully CW
V MODE switch (5) CH 1 (CH 2)
VARIABLE control (13) CAL
Trigger MODE switch (14) AUTO
Trigger SOURCE switch (18) VERT
Trigger LEVEL control (9) Mid rotation
2. Use the corresponding Vertical POSITION control (4) or (7) to set the trace near mid screen.
3. Connect the signal to be observed to the corresponding IN connector (24) or (22) and adjust the
corresponding VOLTS/DIV switch (26) or (23) so the displayed signal is totally on screen.
Caution: Do not apply a signal greater than 250 V (DC + peak AC)
4. Set the TIME/DIV switch (15) so the desired number of signal cycles are displayed. For some
measurements just 2 of 3 cycles are best; for other measurements 50-100 cycles appearing like a
solid band works best. Adjust the Trigger LEVEL control (9) if necessary for a stable display
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5. To set X5 MAG switch at x5 in case motif is not made or difficult to measure as the sign to be
measured is too small despite VOLT/DIV, switch was placed at 5 mV.
In this instance if VOLT/DIV. switch ist 5 mV, become to 1 mV/DIV and frequency oscillation reduces
to 10 MHz and noise will be increased by the revolution.
6. To set X10 MAG switch at X 10 MAG (11) when too many cycles appear on even the TIME/DIV
switch was put on 0.2 µs position as the sign try to be measured is a high frequency.
Then, it will be 0.2 µs 20 ns/DIV because of sweep width increases by 10 times and in case of 0.5 µs
it will be 50 ns/Div.
7. If the signal you wish to observe is either DC or low enough in frequency that AC coupling attenuates
of distorts the signal, flip the AC/GND/DC switch (25) or (21) to DC.
Caution: If the observed waveform is low-level AC, make certain it is not riding on a high-amplitude
DC voltage.
You will also have to reset the Trigger MODE switch (14) to NORM if the signal frequency is below
25 Hz, and possibly readjust the Trigger LEVEL control (9).
2.2.4 Dual-trace operation
Dual-trace operation is the major operating mode of the PeakTech 2020 GN and PeakTech 2030 KT. The
setup for dual-trace operation is identical to that of 2.3.2 Single-trace operation with the following exceptions:
1. Set the V MODE switch (5) to either DUAL. Select ALT for relatively high frequency signals (A
TIME/DIV switch set to 0.5 ms or faster). Select CHOP for relatively low-frequency signals
(TIME/DIV switch set to 1 ms or slower).
2. If both channels are displaying signals of the same frequency, set the Trigger SOURCE switch (18)
to the channel having the steppest-slope waveform. If the signals are different but harmonically
related, trigger from the channel carrying the lowest frequency. Also, remember that if you
disconnect the channel serving as the trigger source, the entire display will free run.
(a) Composite Video Signal
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(b) TV-V Coupling (c) TV-H Coupling
(d) Sync Polarity
Fig. 2-3 Using the TV SYNC Separator
2.2.5 Trigger Options
Triggering is often the most difficult operation to perform on an oscilloscope because of the many options
available and the exacting requirements of certain signals.
Trigger Mode Selection:
When the NORM trigger mode is selected, the CRT beam is not swept horizontally across the face o the
CRT until a sample of the signal being observed, or another signal harmonically related to it, triggers the
timebase. However, this trigger mode is inconvenient because no baseline appears on the CRT screen in the
absense of a signal, or if the trigger controls improperly set. The AUTO trigger mode solves this problem by
causing the timebase to automatically free run when not triggered. This yields a single horizontal line with no
signal, and a vertically-deflected but non-synchronized display when vertical signal is present but the trigger
controls are improperly set. This immediately indicates what is wrong. The only hitch with AUTO operation is
that signals below 25 Hz cannot, and complex signals of any frequency may not realiably trigger the
timebase. Therefore, the usual practice is to leave the trigger MODE switch (14) set to AUTO, but reset it to
NORM if any signal (particulary one below 25 Hz) fails to produce a stable display.
The TV-V and TV-H positions of the Trigger MODE switch insert a TV sync separator into the trigger chain,
so a clean trigger signal at either the vertical-or horizontal-repetition rates can be removed from a composite
video signal (Fig. 2-3 a). To trigger the scope at the vertical rate (Fig. 2-3 b), set the Trigger MODE switch to
TV-V. To trigger the scope at the horizontal (line) rate (Fig. 2-3 c) set the trigger Mode switch to TV-H. For
best results, the TV sync polarity should be negative (Fig. 2-3 d) when the sync separator is used.
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Triggerpoint selection
The SLOPE switch determines whether the sweep will on a positive-going or negative-going transition of the
trigger signal (See fig. 2-4). Always select the steepest and most stable slope or edge. For example, small
changes in the amplitude of the sawtooth shown in Figure 2-4 a will cause jittering if the timebase is triggered
on the positive (ramp) slope, but have no effect if triggering occurs on the negative slope (a fast-fall edge).
In the example shown in Figure 2-4b, both leading and trailing edges are very steep trace to jitter, making
observation difficult. Triggering from the stable leading edge (+ slope) yields a trace that has only the trailing
-edge jitter of the original signal. If you are ever in doubt, or have an unsatisfactory display, try both slopes to
find the best way.
Trigger Level Control
The LEVEL control determines the point on the selected slope at which the main (A) timebase will be
triggered. The effect of the LEVEL control on the displayed trace is shown in figure 2-4 c. The "-","0", and "+"
panel-markings for this control refer to the waveform's zero crossing and points more positive (+) and more
negative (-) than this. If the trigger slope is very steep, as with square waves or digital pulses, there will be no
apparent change in the displayed trace until the LEVEL control is rotated past the most positive or most
negative trigger point, whereupon the display will free run (AUTO Sweep mode) or disappear completely
(NORM sweep mode). Try to trigger at the mid point of slow-rise waveforms (such as sine and triangular
waveforms), since these are usually the cleanest spots on such waveforms.
Fig. 2-4: Trigger-Slope Selection
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Fig. 2-5: Trigger Level Control
2.2.6 Measurement of different frequency
1. In case of two input signs of CH 1 & CH 2 is the same frequency or frequency with a certain times or
a sign has a certain time difference, to select Trigger Source switch (18) in option to CH 1. The sign
is triggered based CH 1 for CH 1 sign respectively.
2. But if you try to trigger two signs which have different frequency to set Trigger Source switch to
VERT.
In this instance, two waveforms trigger stabilized as the motif sign input to each sign source in shift.
2.2.7 Additive and Differential Operation
Additive and differential operation are forms two-channel operation where two signals are combined to
display one trace. In additive operation, the resultant trace represents the algebraic sum of the CH 1 and CH
2 signals. In differential operation, the resultant trace represents the algebraic difference between the CH 1
and CH 2 signals.
To set the PeakTech 2020 GN / PeakTech 2030 KT for additive operation, proceed as follows:
1. Set up for dual-trace operation per paragraph 2-3-4 Dual-trace Operation.
2. Make sure both VOLTS/DIV switches (26) and (23) are set to the same position and the VARIABLE
controls (27) and (20) are click-stopped fully clockwise. Are the signal levels are very different,
set both VOLTS/DIV switches to the position producing a large on-screen display of the highest-
amplitude signal.
3. Trigger from the channel having the best signal.
4. Set the V MODE switch (19) to ADD position. Then, the single trace resulting is the algebraic sum of
the CH 1 and CH 2 signals. Either of both of the Vertical POSITION controls (4) and (7) can be used
to shift the resultant trace.
Note: If the input signals are in-phase, the amplitude of the resultant trace will be the arithmetic
sum of the individual traces (eg. 4.2 div + 1.2 div = 5.4 div). If the input signals are 180°
out-of-phase, the amplitude will be the difference (eg. 4.2 div - 1.2 div = 3.0 div).
5. If the p-p amplitude of the resultant trace is very small, turn both VOLTS/DIV switches to increase
the display height. Make sure both are set to the same position.
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There is another method to measure the sum of two signs for this product. It is the method to select INV
switch to INV concurrently. When input sign is on the equal phase by selection of INV switch the waveform of

ADD will be difference in amplitude of the two signs. (EX: 4.2 Div - 1.2 Div = 3.0 Div.). When input sign has
phase difference of 180° two signs become sum of amplitude.
2.2.8 X-Y Operation
The internal timebase of the PeakTech 2020 GN / PeakTech 2030 KT are not utilized in X-Y Operation;
deflection in both the vertical and horizontal directions is via external signals. Vertical channel 1 serves as
the X-axis (horizontal) signal processor, so horizontal and vertical axes have identical control facilities.
All of the V MODE, and trigger switches, as sell as thire associated controls and connectors, are inoperative
in the X-Y mode.
To set up the PeakTech 2020 GN / PeakTech 2030 KT for X-Y operation, proceed as follows:
1. Turn the TIME/DIV switch (15) fully clockwise to its X-Y positions.
Caution: Reduce the trace intensity, lest the undelected spot damage the CRT phosphor.
2. Apply the vertical signal to the CH 2 or Y IN connector (22), and the horizontal signal to the CH 1 or
X IN connector (24). Once the trace is deflected, restore normal brightness.
3. Adjust the trace height with the CH 2 VOLTS/DIV switch (23) and the trace width with the CH 1
VOLTS/DIV SWITCH (27). The x5 MAG switch (3) on the VARIABLE controls can be used if greater
is necessary, so leave the VARIABLE control (27) knob set CAL.
4. Adjust the trace position vertically (Y-axis) with the CH2 Vertical POSITION control (7). Adjust the
trace position horizontally (X-axis) with the Horizontal POSITION control (10); the CH 1 Vertical
POSITION control has no effect during X-Y operation.
5. Vertical (Y-axis) sign may change the phase by 180° setting CH 2 INV switch.
2.2.9 Component Test Operation (Only PeakTech 2030 KT)
The component test board delivers a sine voltage (60 Hz) which is applied across the component under test.
The sine voltage across the test object is used for the horizontal deflection (V) and voltage-drop (current
through the test object) is used for vertical deflection (I) of the oscilloscope.
By this V-I characteristic curve, the good or fault of component is measured.
To set up the PeakTech 2030 KT for component test operation, proceed as follows:
1. Push the component test switch.
Then the horizontal bar graph of 8 div. is displayed on the screen. The position of bar graph is
controlled with CH2 V-POSITION (7) and H-POSITION (10).
2. Connect the component test input (36) and GND (37) to both terminals of component with DMM
Probe. Then V-I characteristic curve is displayed on the screen (see figure 2-6).
CAUTION!
Using the component test function, don’t apply the signal to CH 1 and CH2 input because the
oscilloscope doesn’t operate in the component test mode.
Don’t push x10 switch because the bar will be fatted. Don’t test the live circuit (operating the power
signal) component.
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a) Short circuit b) Resistor 600 Ohm c) Resistor 1,3 kOhm d) A1. Capacitor 1µF
e) A1. Capacitor f) A1. Capacitor g) Zener+Capacitor h) Resistor + Zener
4,7 µF 100 µF 1 µF (Forward) Diode
i) Resistor+Zener j) Zener Diode k) Zener Diode l) Silicon Diode
(Reverse) below 7 V beyond 7 V
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2.3 Measurement Applications
This section contains instructions for using your PeakTech 2020 GN / PeakTech 2030 KT for specific
measurement procedures. However, this is but a small sampling of the many applications possible for this
oscilloscope. These particular applications were selected to demonstrate certain controls and features not
fully covered in BASIC OPERATING PROCEDURES, to clarify certain operations by example, or for their
importance and universality.
2.3.1 Amplitude Measurements
The modern triggered sweep oscilloscope has two major measurement functions. The first of these is
amplitude. The oscilloscope has an advantage over most other forms of amplitude measurement in that
complex as well as simply waveforms can be totally characterized (i. e. complete voltage information is
available).
Oscilloscope voltage measurement generally fall into one of two types: peak-to-peak or instantaneous peak-
to-peak (p-p) measurement simply notes the total amplitude between extremes without regard to polarity
reference. Instantaneous voltage measurement indicates the exact voltage from each every point on the
waveform to a ground reference. When making either type of measurement, make sure that the VARIABLE
controls are click-stopped fully clockwise.
Peak-to-Peak Voltages
To measure peak-to-peak voltage, proceed as follows:
1. Set up the scope for the vertical mode desired per the instructions in 2-3 BASIC OPERATING
PROCEDURES.
2. Adjust the TIME/DIV switch (15) for two or three cycles of waveform, and set the VOLTS/DIV
switch for the largest-possible totally-on-screen display.
3. Use the appropriate Vertical POSITION control (4) or (7) to position the negative signal peaks on
the nearest horizontal gratitude line below the signals peaks, per Figure 2-5.
4. Use the Horizontal POSITION control (10) to position one of the positive peaks on the central vertical
gratitude line. This line has additional calibration marks equal to 0.2 major division each.
5. Count the numer of division from the gratitude line touching the negative signal peaks to the
intersection of the positive signal peak with the central vertical gratitude line. Multiply this number by
the VOLTS/DIV switch setting to get the peak-to-peak voltage of the waveform. For example, if the
VOLTS/DIV switch were set to 2 V, the waveform shown in Figure 2-5 would be 8.0 Vpp (4.0 div x 2
V).
6. If x 5 vertical magnification is used, divide the step 5 voltage by 5 to get the correct p-p voltage.
However if 10 x attenuator probes are used, multiply the voltage by 10 to get the correct p-p voltage.
7. If measuring a sine wave below 100 Hz, or a rectangualar wave below 1000 Hz, flip the AC/GND/DC
switch to DC.
Caution: Make certain the waveform is not riding on a higher-amplitude DC voltage.
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Fig. 2.5: Peak-To-Peak Voltage Measurement Fig. 2.6: Instantaneous Voltage Measurements
Instantaneous Voltages:
To measure instantaneous voltage, proceed as follows:
1. Set up the scope for the vertical mode desired per the instructions in 2.3 BASIC OPERATING
PROCEDURES.
2. Adjust the TIME/DIV switch (15) for one complete cycle of waveform and set the VOLTS/DIV
switch for a trace amplitude of 4 to 6 divisions (see Figure 2.6)
3. Flip the AC/GND/DC switch (25) or (21) to GND.
4. Use the appropriate Vertical POSITION control (4) or (7) to set the baseline on the central
horizontal gratitude line. However, if you know the signal voltage is wholly positive, use the
bottommost gratitude line. If you know the signal voltage is wholly negative, use the uppermost
gratitude line.
5. Flip the AC/GND/DC switch to DC. The polarity of all points above the ground reference line is
positive; all points below the ground-reference line are negative.
Caution: Make certain the waveform is not riding on a high-amplitude DC voltage before flipping the
AC/GND/DC switch.
6. Use the horizontal POSITION control (10) to position any point of interest on the central vertical
gratitude line. This line has additional calibration marks equal to 0.2 major division each. The voltage
relative to ground at any point selected is equal to the number of divisions from that point to the
ground reference line multiplied by the VOLTS/DIV setting. In the example used for figure 2-6, the
voltage for a 0.5 V/div scale is 2.5 V (5.0 div x 5 V).
7. If x 5 vertical magnification is used, divide the step 6 voltage by 5. However, if 10 x attenuator probes
are used, multiply the voltage by 10.
2.3.2 Time Interval Measurements
The second major measurement function of the triggered-sweep oscilloscope is the measurement of time
interval. This is possible because the calibrated time base results in each division of the CRT screen
representing a known time interval.
Basic Technique
The basic technique for measuring time interval is described in the following steps. This same technique
applies to the more specific procedures and variations that follow:
1. Set up scope as described in 2.3.2 Single-trace operation.
2. To settle Time/Div (15) larger as much as possible so that it may appear on the screen.
To place VAR switch (13) at CAL. Please be careful as the measured value may be incorrect if you
do not follow this instructions.
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